General engine tech -- Drag Racing to Circle Track
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vortecpro
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by vortecpro » Sun Jan 29, 2017 8:20 pm
KnightEngines wrote:Those heads looked ok, what was the MCSA & flow?
In other news the block is not cracked
Turns out it's just had some water sitting in it at some point & the 'crack' was just some staining.
Ran the crack tester over the whole valley & it's good.
Small win, not having to do a crack repair puts $ towards the new pistons.
"what was the MCSA & flow?"
My heads flowed 238/184, don't know the MCSA. They were 1.940/1.50 on the valves, needless to say they were not very good, I used a 040 casting and they would not respond at all. I did a set of 291s before these and they went 247 with the 1.940, and I consider that good for myself.
Racing a NA NHRA stocker should be mandatory before any posting.
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Carnut1
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by Carnut1 » Fri Feb 02, 2018 3:07 pm
This was a cool project, ever get any dyno #s? Thanks, Charlie
Servedio Cylinder Head Development
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KnightEngines
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by KnightEngines » Fri Feb 02, 2018 5:49 pm
I'll have to find out, last I heard the lads were still painting the car & motor wasn't fitted yet, but that was a couple of months ago.
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Dan Timberlake
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by Dan Timberlake » Sat Feb 03, 2018 7:53 am
I didn't read the whole thread.
Since a crack in the block was found, I presume the crank and rods were mag particle tested before the rods were re-worked?
We found lots of ugly stuff and even outright problems in Gen 1 SBC broached con rod bolt head notches back in the 70s and 80s.
Problems = progressing fatigue cracks even on rods from engines that served passenger car service. Maybe they all came from families with teenaged sons.
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jlbayes
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by jlbayes » Thu Feb 08, 2018 1:38 pm
KnightEngines wrote: ↑Mon Jan 23, 2017 9:26 pm
In other news the block is not cracked
Turns out it's just had some water sitting in it at some point & the 'crack' was just some staining.
Ran the crack tester over the whole valley & it's good.
Small win, not having to do a crack repair puts $ towards the new pistons.
Dan Timberlake wrote: ↑Sat Feb 03, 2018 7:53 am
I didn't read the whole thread.
Since a crack in the block was found, I presume the crank and rods were mag particle tested before the rods were re-worked?
We found lots of ugly stuff and even outright problems in Gen 1 SBC broached con rod bolt head notches back in the 70s and 80s.
Problems = progressing fatigue cracks even on rods from engines that served passenger car service. Maybe they all came from families with teenaged sons.
You should have.
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KnightEngines
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by KnightEngines » Fri Feb 09, 2018 7:16 pm
It's in the car & performing very well, not raced yet & just tuned on the street - but apparently feels pretty strong, owner is a happy camper.
Will see the strip some time soonish.